TOPS does support WLS. One of their award categories is for those who had WLS, though I don't know why they're making that distinction. I guess because of the perception that WLS is such an advantage.
TOPS has been very successful for my mom. For me...not so much. It may just be the local chapter, but the ladies are almost all over 60, so I felt a little out of place. They also play a lot of cutesy games that I wasn't really into. I wasn't getting anything out of the meetings, so I quit a while back.